i have question in P&O

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nada juburi
nada juburi 2018-5-30
回答： nada juburi 2018-5-30
dear sir i have design four panels two series and 2 parallel array of pv and want to apply mppt with buck boost convertor the panel have vmax =54.7 and vo on load give -48 so when design buck boost as the load requried the load consumed power 1300 and l=(1-d)^2*R/2f d=dutycycle and cmin=vod/vrfR i try to change the ferquncey but there is mistake can any body help me please??

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回答（2 个）

nada juburi
nada juburi 2018-5-30
how can i found dmax and dmin and d intial
nada juburi
nada juburi 2018-5-30
function D = PandO(Param, Enabled, V, I)
% MPPT controller based on the Perturb & Observe algorithm.
% D output = Duty cycle of the boost converter (value between 0 and 1) % % Enabled input = 1 to enable the MPPT controller % V input = PV array terminal voltage (V) % I input = PV array current (A) % % Param input: Dinit = Param(1); %Initial value for D output Dmax = Param(2); %Maximum value for D Dmin = Param(3); %Minimum value for D deltaD = Param(4); %Increment value used to increase/decrease the duty cycle D % ( increasing D = decreasing Vref ) %
persistent Vold Pold Dold;
dataType = 'double';
if isempty(Vold) Vold=0; Pold=0; Dold=Dinit; end P= V*I; dV= V - Vold; dP= P - Pold;
if dP ~= 0 & Enabled ~=0 if dP < 0 if dV < 0 D = Dold - deltaD; else D = Dold + deltaD; end else if dV < 0 D = Dold + deltaD; else D = Dold - deltaD; end end else D=Dold; end
if D >= Dmax D<= Dmin D=Dold; end
Dold=D; Vold=V; Pold=P;

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